What is the meaning of routine?

noun

• An unvarying or habitual method or procedure.
  • synonyms: modus operandi
• A short theatrical performance that is part of a longer program.
  • usage: "he did his act three times every evening"; "she had a catchy little routine"; "it was one of the best numbers he ever did"
  • synonyms: act, number, turn, bit
• A set sequence of steps, part of larger computer program.
  • synonyms: subroutine, subprogram, procedure, function

adjective

• Found in the ordinary course of events."a placid everyday scene"; "it was a routine day"; "there's nothing quite like a real... Train conductor to add color to a quotidian commute- Anita Diamant
  • synonyms: everyday, mundane, quotidian, unremarkable, workaday